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+# Plan: Implement TTL Heartbeat Service Registration (`implement_ttl_heartbeat`)
+
+## Phase 1: Container Environment Preparation [x] [checkpoint: 51b8fce]
+- [x] Task: Update `Dockerfile` to install `curl` and `jq` (f7fe258)
+- [x] Task: Verify `litefs.yml` points to `entrypoint.sh` (should already be correct) (verified)
+- [x] Task: Conductor - User Manual Verification 'Phase 1: Container Environment Preparation' (Protocol in workflow.md)
+
+## Phase 2: Script Implementation [ ]
+- [ ] Task: Refactor `entrypoint.sh` with the TTL Heartbeat logic
+    - [ ] Implement `register_service` with TTL check definition
+    - [ ] Implement `pass_ttl` loop
+    - [ ] Implement robust `stop_app` and signal trapping
+    - [ ] Ensure correct Primary/Replica detection logic (LiteFS 0.5: Primary = No `.primary` file)
+- [ ] Task: Conductor - User Manual Verification 'Phase 2: Script Implementation' (Protocol in workflow.md)
+
+## Phase 3: Deployment and Verification [ ]
+- [ ] Task: Commit changes and push to Gitea to trigger build
+- [ ] Task: Monitor Gitea build completion
+- [ ] Task: Deploy updated Nomad job (forcing update if necessary)
+- [ ] Task: Verify "Clean" state in Consul (only one primary registered)
+- [ ] Task: Verify Failover/Stop behavior (immediate deregistration vs TTL expiry)
+- [ ] Task: Conductor - User Manual Verification 'Phase 3: Deployment and Verification' (Protocol in workflow.md)